[Ipopt] Octave MEX interface on containerized macOS

[Ray Zimmerman]

Thanks Ted. This is helpful.

FYI, when I tried using coinbrew to install from source, I got an error due to macOS bash being older than required. So I believe bash needs to be added to the brew installs listed here <https://coin-or.github.io/user_introduction.html#os-x-1> that should be done before running coinbrew.

I’m able to build IPOPT from source now, both 3.13 (which I discovered no longer includes the files to build the Matlab interface) and 3.12 (which does). My (hopefully last) remaining roadblock is collecting the correct include and lib options to use to make the MEX interface.

The Makefile I used to build successfully with Homebrew installed ipopt has the following lines …

INCL = `pkg-config --cflags ipopt` -I`mkoctfile -p OCTINCLUDEDIR`
LIBS = `pkg-config --libs ipopt`

And pkg-config complains that "Package ipopt was not found in the pkg-config search path."
Can anyone offer a suggestion on how to modify them for an installation of IPOPT that was built from source?

Thanks,

    Ray


> On Nov 20, 2019, at 9:24 AM, Ted Ralphs <ted at lehigh.edu> wrote:
> 
> I don't know that much about Mumps, but it looks like the Ipopt homebrew recipe builds Ipopt with the MPI version of Mumps. The formula is here:
> 
> https://github.com/Homebrew/homebrew-core/blob/master/Formula/ipopt.rb <https://github.com/Homebrew/homebrew-core/blob/master/Formula/ipopt.rb>  
> 
> It looks to me like the easiest solution is just to build Ipopt yourself instead of with Homebrew. You are already downloading the Ipopt code anyway, so this would seem to be straightforward. If you really need to install from homebrew, I just found another tap that provides an Ipopt recipe and expicitly allows the option not to use MPI:
> 
> https://github.com/dpo/homebrew-openblas <https://github.com/dpo/homebrew-openblas/tree/master/Formula>
> 
> You could either use this one or submit a PR to Homebrew core to ask that this option be added (not sure how successful this will be).
>  
> Cheers, 
> 
> Ted 
> 
> 
> 
> On Tue, Nov 19, 2019 at 11:18 PM Ray Zimmerman <rz10 at cornell.edu <mailto:rz10 at cornell.edu>> wrote:
> Hi all,
> 
> I use Octave with IPOPT for continuous integration testing of some of my code via Travis CI. I am able to build a working MEX file in their Linux container, but so far I’m getting MPI runtime errors in their macOS container.
> 
> Homebrew is used to install IPOPT and Octave in the macOS container …
> 
> brew install ipopt
> brew install octave
> 
> … then grab the corresponding source from the coin-or.org <http://coin-or.org/> site, and build it using the Makefile below, as follows:
> 
> IPOPT_VER=3.12.13
> curl -SL https://www.coin-or.org/download/source/Ipopt/Ipopt-${IPOPT_VER}.tgz <https://www.coin-or.org/download/source/Ipopt/Ipopt-$%7BIPOPT_VER%7D.tgz> | tar -xzC $TRAVIS_BUILD_DIR/build
> mv $TRAVIS_BUILD_DIR/build/Ipopt-${IPOPT_VER}/Ipopt/contrib/MatlabInterface $TRAVIS_BUILD_DIR/build/ipopt
> mv $TRAVIS_BUILD_DIR/.travis/Makefile $TRAVIS_BUILD_DIR/build/ipopt/src
> make -C $TRAVIS_BUILD_DIR/build/ipopt/src
> 
> It builds fine, but at runtime, when attempting to call the MEX file from Octave, I get the following error:
> 
> *** The MPI_Comm_f2c() function was called before MPI_INIT was invoked.
> *** This is disallowed by the MPI standard.
> *** Your MPI job will now abort.
> [Traviss-Mac-6.local:87648] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed!
> 
> Any suggestions for how to modify either the homebrew IPOPT install or the MEX build to avoid the use of MPI?
> 
> Thanks,
> 
>     Ray
> 
> ————————————————
> 
> Makefile contents:
> 
> # Copyright 2017 Richard Lincoln. All rights reserved.
> 
> OBJS = callbackfunctions.o \
>        ipoptoptions.o \
>        ipopt.o \
>        iterate.o \
>        matlabexception.o \
>        matlabfunctionhandle.o \
>        matlabinfo.o \
>        matlabjournal.o \
>        matlabprogram.o \
>        options.o \
>        sparsematrix.o
> 
> CXXFLAGS = -fPIC -std=c++11 -O3 -DIPOPT_BUILD -DMATLAB_MEXFILE -DHAVE_CSTDDEF
> 
> INCL = `pkg-config --cflags ipopt` -I`mkoctfile -p OCTINCLUDEDIR`
> LIBS = `pkg-config --libs ipopt`
> 
> all: ipopt.mex
> 
> %.o: %.cpp
>     g++ $(CXXFLAGS) $(INCL) -o $@ -c $^
> 
> ipopt.mex: $(OBJS)
>     mkoctfile $(LIBS) -v --mex --output $@ $^
> 
> clean:
>     rm -f $(OBJS) ipopt.mex
> 
> check:
>     octave-cli --no-gui -p `pwd`/examples --eval "examplehs038;examplehs051;examplehs071;examplelasso"
> 
> _______________________________________________
> Ipopt mailing list
> Ipopt at list.coin-or.org <mailto:Ipopt at list.coin-or.org>
> https://list.coin-or.org/mailman/listinfo/ipopt <https://list.coin-or.org/mailman/listinfo/ipopt>
> 
> 
> -- 
> Dr. Ted Ralphs
> Professor, Industrial and Systems Engineering
> Lehigh University
> (610) 628-1280
> ted 'at' lehigh 'dot' edu
> coral.ie.lehigh.edu/~ted <http://coral.ie.lehigh.edu/~ted>

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